Experimental and computational analysis of failure mechanisms in unidirectional carbon fiber reinforced polymer laminates under longitudinal compression loading

Sun, Qingping; Guo, Haiding; Zhou, Guowei; Meng, Zhaoxu; Chen, Zhangxing; Kang, Hongtae; Keten, Sinan; Su, Xuming

doi:10.1016/j.compstruct.2018.06.028

Experimental and computational analysis of failure mechanisms in unidirectional carbon fiber reinforced polymer laminates under longitudinal compression loading

Journal Article · Fri Jun 15 04:00:00 EDT 2018 · Composite Structures

DOI:https://doi.org/10.1016/j.compstruct.2018.06.028· OSTI ID:1504738

Sun, Qingping ^[1]; Guo, Haiding ^[2]; Zhou, Guowei ^[3]; Meng, Zhaoxu ^[4]; Chen, Zhangxing ^[5]; Kang, Hongtae ^[6]; Keten, Sinan ^[4]; Su, Xuming ^[7]

Nanjing University of Aeronautics and Astronautics (China); Department of Civil and Environmental Engineering, Northwestern University
Nanjing University of Aeronautics and Astronautics (China)
The Ohio State Univ., Columbus, OH (United States); Ford Motor Company, Dearborn, MI (United States)
Northwestern Univ., Evanston, IL (United States)
Chongqing University (China)
Univ. of Michigan, Dearborn, MI (United States)
Ford Motor Company, Dearborn, MI (United States)

Here, his study investigates the failure mechanisms of notched unidirectional (UD) carbon fiber reinforced polymer (CFRP) laminates subjected to longitudinal compressive loading. A sequence of failure initiation and propagation is observed based on optical microscopy images of specimens during failure. The micrographs reveal that the main failure mechanism in UD laminates is fiber kinking failure. The influence of manufacturing defects and voids on fiber kinking mechanisms is also analyzed. The results show that the voids in the resin-rich area lead to kink-band splitting, while in some cases the voids cause the kink-band to deflect in a new direction depending on the location of the voids. The next focus of this study is to propose a computational micromechanics model considering local fiber waviness to study the fiber kinking failure mechanism. The computational results on kink-band formation and stress-strain response show good consistency with our experimental analysis. Lastly, the failure envelopes of σ₁₁-σ₂₂ and σ₁₁-τ₁₂ subjected to combined loading conditions are obtained from the computational model, which provide essential inputs for future theoretical failure criteria.

View Accepted Manuscript (DOE)

Research Organization:: Ford Motor Company, Dearborn, MI (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)

Grant/Contract Number:: EE0006867

OSTI ID:: 1504738

Alternate ID(s):: OSTI ID: 1548128

Journal Information:: Composite Structures, Journal Name: Composite Structures Journal Issue: C Vol. 203; ISSN 0263-8223

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
Carbon fiber reinforced polymer laminate
Compressive failure
Computational model
Failure envelope
Fiber kinking
Fiber waviness
Manufacturing defects

Experimental and computational analysis of failure mechanisms in unidirectional carbon fiber reinforced polymer laminates under longitudinal compression loading

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References (41)

Cited By (2)

Figures / Tables (18)

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